School EMF Research

Cell Type-Dependent Induction of DNA Damage by 1800 MHz Radiofrequency Electromagnetic Fields Does Not Result in Significant Cellular Dysfunctions.

Xu S et al. · 2013

The effect of prenatal exposure to 900-MHz electromagnetic field on the 21-old-day rat testicle

Hancı H et al. · 2013

Turkish researchers exposed pregnant rats to 900 MHz cell phone frequency radiation during late pregnancy, then examined the testicles of their male offspring at 21 days old. The exposed offspring showed damaged sperm-producing structures, increased cell death, and higher levels of oxidative damage compared to unexposed controls.

The effect of prenatal exposure to 900-MHz electromagnetic field on the 21-old-day rat testicle

Hancı H et al. · 2013

Turkish researchers exposed pregnant rats to 900-MHz electromagnetic fields (similar to 2G cell phone radiation) during late pregnancy and examined their male offspring's testicles at 21 days old. The EMF-exposed pups showed significant damage including irregular sperm tubes, increased cell death, and higher levels of DNA damage compared to unexposed controls.

The effect of prenatal exposure to 900-MHz electromagnetic field on the 21-old-day rat testicle

Hancı H et al. · 2013

Turkish researchers exposed pregnant rats to 900 MHz electromagnetic fields (similar to 2G cell phones) during late pregnancy and examined their male offspring's testicles at 21 days old. The exposed offspring showed damaged sperm-producing tubes, increased cell death, and higher levels of oxidative stress compared to unexposed controls.

Effects of long-term electromagnetic field exposure on spatial learning and memory in rats.

Hao D, Yang L, Chen S, Tong J, Tian Y, Su B, Wu S, Zeng Y · 2013

Researchers exposed 32 trained Wistar rats to 916 MHz, 10w/m2 electromagnetic field for 6 hours a day, 5 days a week, over 10 weeks, and tested their spatial learning and memory in an eight-arm radial maze each weekend. During weeks 4–5, the exposed rats had longer completion times and higher error rates than the control group, but during weeks 1–3 and 6–9 the two groups were close to each other. The researchers concluded that the 916 MHz EMF influenced learning and memory in rats to some extent in a period during exposure, and that the rats can adapt to long-term EMF exposure.

Maternal mobile phone exposure adversely affects the electrophysiological properties of Purkinje neurons in rat offspring.

Haghani M, Shabani M, Moazzami K. · 2013

Researchers exposed pregnant rats to 900-MHz mobile phone radiation for 6 hours daily throughout pregnancy and studied the brain development of their offspring. While the young rats showed no obvious behavioral problems, detailed electrical measurements revealed that specialized brain cells called Purkinje neurons (which help control movement and coordination) had altered electrical activity. This suggests that prenatal cell phone exposure can affect brain development at the cellular level, even when outward behavior appears normal.

Extremely low-frequency electromagnetic fields induce neural differentiation in bone marrow derived mesenchymal stem cells.

Kim HJ, Jung J, Park JH, Kim JH, Ko KN, Kim CW. · 2013

Increase of seed germination, growth and membrane integrity of wheat seedlings by exposure to static and a 10-KHz electromagnetic field.

Payez A et al. · 2013

Both field types increased the speed of germination but did not affect germination percent, compared to the control group. EMF significantly reduced seedling length and vigor index I, while SMF had no effects on these parameters, but both treatments significantly increased vigor index II. Both treatments increased catalase activity and proline contents but reduced peroxidase activity, lipid peroxidation, and electrolyte leakages of membranes.

Effect of low level microwave radiation exposure on cognitive function and oxidative stress in rats

Deshmukh PS et al. · 2013

Researchers exposed rats to extremely low-level 900 MHz microwave radiation (similar to cell phone frequencies) for 2 hours daily over 30 days. The exposed rats showed significant memory and learning problems, plus increased oxidative stress (cellular damage) in their blood. This matters because the radiation level was about 1,000 times lower than current safety limits, yet still caused measurable brain and cellular effects.

Fifty-Hertz electromagnetic fields facilitate the induction of rat bone mesenchymal stromal cells to differentiate into functional neurons.

Bai WF, Xu WC, Feng Y, Huang H, Li XP, Deng CY, Zhang MS. · 2013

Researchers exposed rat bone marrow stem cells to 50 Hz electromagnetic fields (the same frequency as household electricity) for one hour daily over 12 days. The EMF exposure significantly enhanced the stem cells' ability to transform into functional brain neurons, complete with working synapses and electrical activity. This suggests that power frequency magnetic fields can directly influence cellular development and may have therapeutic applications for treating nervous system diseases.

Effect of low level microwave radiation exposure on cognitive function and oxidative stress in rats.

Deshmukh PS et al. · 2013

Researchers exposed rats to extremely low-level 900 MHz microwave radiation (similar to cell phone frequencies) for 2 hours daily over 30 days. The exposed rats showed significant cognitive impairment and increased oxidative stress (cellular damage from harmful molecules called free radicals) compared to unexposed control rats. This suggests that even very weak microwave radiation can affect brain function and cause cellular damage.

Rat fertility and embryo fetal development: influence of exposure to the Wi-Fi signal.

Poulletier de Gannes F et al. · 2013

Researchers exposed male and female Wistar rats to a 2450 MHz Wi-Fi signal for 1 hour per day, 6 days per week. Exposure lasted 3 weeks for males and 2 weeks for females before mating, then continued for 3 more weeks during gestation. No deleterious effects on reproductive organs or fertility were observed, and no macroscopic abnormalities were found in fetuses even at 4 W/kg.

In Situ Expression of Heat-Shock Proteins and 3- Nitrotyrosine in Brains of Young Rats Exposed to a WiFi Signal In Utero and In Early Life

Aït-Aïssa S et al. · 2013

This study examined whether WiFi signal exposure (2450 MHz) during pregnancy and early life affected stress markers in rat brains by measuring 3-Nitrotyrosine and heat-shock proteins (Hsp25 and Hsp70) using immunohistochemistry. The researchers found no significant differences in these biomarkers between rats exposed to WiFi at various power levels (0-4 W/kg) and sham-exposed controls, suggesting repeated WiFi exposure during gestation and early postnatal development did not cause detectable adverse effects in young rat brains.

In Situ Expression of Heat-Shock Proteins and 3- Nitrotyrosine in Brains of Young Rats Exposed to a WiFi Signal In Utero and In Early Life

Aït-Aïssa S et al. · 2013

This study investigated whether prenatal and early-life exposure to WiFi signals (2450 MHz) affected stress markers in developing rat brains by measuring 3-Nitrotyrosine and heat-shock proteins (Hsp25 and Hsp70) in hippocampal and cortical tissues. The researchers found no significant differences in these biomarkers between WiFi-exposed and sham-exposed young rats across multiple dose levels, concluding that repeated WiFi exposure during gestation and early life did not produce detectable deleterious effects on developing rat brains.

In Situ Expression of Heat-Shock Proteins and 3-Nitrotyrosine in Brains of Young Rats Exposed to a WiFi Signal In Utero and In Early Life

Aït-Aïssa S et al. · 2013

This study examined whether prenatal and early-life exposure to WiFi signals (2450 MHz) affected stress biomarkers in developing rat brains. Researchers measured 3-nitrotyrosine and heat-shock proteins (Hsp25 and Hsp70) in brain tissue of young rats exposed to various WiFi signal intensities, finding no significant differences between exposed and sham-exposed groups.

Rat fertility and embryo fetal development: influence of exposure to the Wi-Fi signal

Poulletier de Gannes F et al. · 2013

French researchers exposed pregnant rats and their developing offspring to Wi-Fi signals at 2.45 GHz for several weeks, including during mating and pregnancy. They found no harmful effects on fertility, pregnancy outcomes, or fetal development, even at exposure levels of 4 watts per kilogram. This suggests Wi-Fi exposure may not significantly impact reproductive health in this animal model.

Exposure assessment of mobile phone base station radiation in an outdoor environment using sequential surrogate modeling.

Aerts S et al. · 2013

Researchers introduced a new method for mapping outdoor exposure to base station radiation that combines surrogate modeling with sequential design. They reported that 50 measurement locations were enough to create a coarse street exposure map identifying high and low exposure regions, and 70 locations were enough to build an accurate predictive interpolation model of the electric field distribution.

The effect of pulsed electromagnetic radiation from mobile phone on the levels of monoamine neurotransmitters in four different areas of rat brain

Aboul Ezz HS, Khadrawy YA, Ahmed NA, Radwan NM, El Bakry MM · 2013

Researchers investigated the effect of electromagnetic radiation on concentrations of dopamine, norepinephrine, and serotonin in the hippocampus, hypothalamus, midbrain, and medulla oblongata of adult rats. Adult rats were exposed daily to electromagnetic radiation at 1800 MHz, with a specific absorption rate of 0.843 W/kg and power density of 0.02 mW/cm2, modulated at 217 Hz. Measurements were taken after 1, 2, and 4 months of daily exposure, and also after stopping exposure for 1 month following 4 months of daily exposure. The exposure resulted in significant changes in dopamine, norepinephrine, and serotonin in all four brain areas studied.

The effect of pulsed electromagnetic radiation from mobile phone on the levels of monoamine neurotransmitters in four different areas of rat brain.

Aboul Ezz HS, Khadrawy YA, Ahmed NA, Radwan NM, El Bakry MM. · 2013

Researchers exposed rats to cell phone radiation (1800 MHz, similar to 2G networks) for up to 4 months and measured key brain chemicals called neurotransmitters that control mood, memory, and learning. The radiation significantly altered levels of dopamine, serotonin, and norepinephrine across four different brain regions. These chemical changes could explain why some people report memory problems, learning difficulties, and increased stress after heavy cell phone use.

Oxidative and genotoxic effects of 900 MHz electromagnetic fields in the earthworm Eisenia fetida.

Tkalec M, Stambuk A, Srut M, Malarić K, Klobučar GI. · 2013

Researchers exposed earthworms (Eisenia fetida) in vivo to 900 MHz radiofrequency electromagnetic fields at field levels of 10, 23, 41 and 120 V m(-1) for 2 hours using a Gigahertz Transversal Electromagnetic (GTEM) cell. All exposure treatments induced significant genotoxic effects in earthworm coelomocytes, as detected by the Comet assay. The results also indicated enhanced catalase and glutathione reductase activity, as well as lipid and protein oxidative damage. Antioxidant responses and the potential for damage to lipids, proteins, and DNA differed depending on field level, field modulation, and duration of exposure.

The prophylactic effect of vitamin C on induced oxidative stress in rat testis following exposure to 900 MHz radio frequency wave generated by a BTS antenna model.

Jelodar G, Nazifi S, Akbari A. · 2013

Researchers exposed adult male Sprague–Dawley rats to 900 MHz radiofrequency waves for 45 days. RFW exposure decreased antioxidant enzyme activity and increased malondialdehyde levels in testis tissue. Vitamin C improved antioxidant enzyme activity and reduced malondialdehyde compared with RFW-only rats.

Extensive frequency selective measurements of radiofrequency fields in outdoor environments performed with a novel mobile monitoring system.

Estenberg J, Augustsson T. · 2013

Researchers developed a car-based measuring system to estimate outdoor radiofrequency field exposure across rural, urban, and city areas of Sweden. The median power density was 16 µW/m(2) in rural areas, 270 µW/m(2) in urban areas, and 2400 µW/m(2) in city areas. In urban and city areas, base stations for mobile phones were clearly the dominating sources of exposure.

Transient and cumulative memory impairments induced by GSM 1.8 GHz cell phone signal in a mouse model

Ntzouni MP et al. · 2013

Response of Hippocampal Neurons and Glial Cells to Alternating Magnetic Field in Gerbils Submitted to Global Cerebral Ischemia.

Rauš S et al. · 2013

Researchers studied whether exposure to an extremely low-frequency magnetic field (ELF-MF, 50 Hz) affects postischemic damage in the hippocampus of Mongolian gerbils. After 10-min bilateral carotid occlusion, gerbils were continuously exposed to ELF-MF at an average magnetic induction of 0.5 mT for 7 days, with outcomes assessed on the seventh and 14th days after reperfusion. Ischemic gerbils exposed to ELF-MF had significantly lower cell loss and greater astrocyte and microglial responses compared with ischemic gerbils without exposure on the seventh day after reperfusion. By the 14th day after reperfusion, differences in the measured parameters were low and insignificant.

Response of Hippocampal Neurons and Glial Cells to Alternating Magnetic Field in Gerbils Submitted to Global Cerebral Ischemia.

Rauš S et al. · 2013

Researchers exposed gerbils to 50 Hz magnetic fields (the same frequency as power lines) after inducing stroke-like brain damage to see if EMF exposure affected recovery. They found that animals exposed to magnetic fields at 0.5 mT had significantly less brain cell death and better immune cell responses compared to unexposed animals. This suggests that certain magnetic field exposures might actually protect brain tissue during injury recovery.